: Question (*1):
: I have a homemade finish of 1 part BLO, 1 part TO, 2 parts varnish,
: and 2 parts pure terps.
: The unused portion of the last batch I made, (and stored in a closed
: mason jar), turned all icky-gooey(*2) on the top third or so, making
: it, (I assume), unusable.
Yes. It's started to polymerize due to exposure to oxygen.
: Can I preserve what's left of my current batch by covering it with a
: film of plastic wrap like I do with unused paint or is this a really
: baaad idea? If so, any suggestions? (*3)
If it was completely protected from air, you could try this, but if it's
iff I would toss it and make up a fresh batch.
There's a few things you can do to keep this from happening again. The
best one is to get a can of Bloygen, which is a mixture of inert gasses
that is heavier than air. You squirt it into the jar, and the gas settles
on top, preventing any oxygen contact. You can get it at woodworking
stores, as well as liquor stores (it's sold to protect wine as well).
-- Andy Barss